Advice please! Labour ?!?! Ftm!! when will i know to phone midwife

Cat ❤👣🍼 • I'm 23 years old. Married on 5.07.14 to my soulmate. First baby Nesbitt due in November❤🍼👣👶
I am having really bad cramping!! Well I say really bad, could be nothing compared to stuff later on. So yeah how do I know of I'm in 'labour'. The cramps if that's what they are have woken me up as they are painful. I don't really know what to expect. Most pain is coming from the front and some at my back. I had a small amount of "stool" buy nothing else. Please help... Feel like I want that gas and air now or at least a paracetamol haha I'm 40+3 weeks. Its all very sore. Been on an off since 6.30 am and it is now 10am.